carloshr

I've just deployed a self hosted vikunja server for my work team. I'm trying it right now. So far it looks pretty well. You can add tasks, group them into projects and establish relationships between them. I recoomend to give it a chance. https://vikunja.io/

What do you mean with "anonymous login"? If you need to create an account, then it's not anonymous.

I think any Android version is better in terms of privacy than iphone. iOS is property and a lot closer and less customizable than android. If you are really concerned about privacy, my suggestion is not to use iphone.